401 Access Token not linked to a Tool associated with this Context

[pwnyett]

Hi There, I have created LTI integration for AGS services, I tested it in our platform and it was working fine, I can get line items or create one. But when we did the integration for customers, (note: configured developer key, app installed we tried both and "manually" and "By ClientId") the request token was granted successfully but the request for getting line_items https://Domain/api/lti/courses/{contextId}/line_items returning "401 : Access Token not linked to a Tool associated with this Context". I can't do a lot of testing or checks in customers platform, so can you please give me a hint how to fix this, I'm pretty sure it's configuration issue in their side, but don't know how to fix it. Thanks in advance 🙂 

[matthew_buckett]

Have they added the tool to course in question? Canvas only allows you to the AGS service for courses which have the tool active in them.

[pwnyett]

Can You please explain a bit more, how they should add it so I can confirm. By developers key ? 

[matthew_buckett]

There's a reference in the documentation: https://canvas.instructure.com/doc/api/file.assignment_tools.html#accessing-ags which says that the tool must be available in the course. The AGS is a LTI 1.3 service so the only way to make the tool available in the course is by adding it with the client ID.